2. You should stand up when the King does.

Justification: To respect and obey the king.
Exception: None
The head of state is exactly the same as the King of England. This holy position has existed for more than a millennium, and the Royal Rules on this list are all about respecting and reverencing it.

You should stand when the king does (Brendon Thorne/Getty Images).
The Royals have maintained their formality, and guests are expected to follow these rules when visiting one of the strongholds of the House of Windsor. For example, when King Charles III stands, so does everyone else, and nobody sits until he does as well.